See image — AITS & Test Series Chemistry Question
Question
See image

Answer: 213
💡 Solution & Explanation
3 PH g P g 3H g o 1 atom H 954 kJ mol 1 average BE 954 P H 318 kJ mol 3 2 4 atm P H g 2P g 4H g H 1485 BE BE P P 4 P H 1485 BE P P 4 318 1485 BE P P 1485 1272 1 213 kJ mol
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